they discussed how you get pinkeye in the movie Knocked Up. Not saying this is how you got it Locke, but just sayin.

Jonah: We got pinkeye.
Ben Stone: Were you giving butterfly kisses or something?
Jason: Ha ha ha, very funny That's not how you get pinkeye. You get it from poo particles making their way into your ocular cavities.
Jay: Um, I farted on Jason's pillow as a practical joke. He farted on Jonah's, thinking it was mine, and then eventually pinkeyed my pillow. I'm not proud any of this, but I think we're all forgiven each other. Um, but we can't go anywhere.
Pete: You can get pinkeye from farting in a pillow?
Jonah: Totally!
Pete: That's awesome!
Jonah: Jesus, Martin got it bad. What, did someone take a dump on your eye?
Martin: No. No pinkeye for me. I'm just really... high.